Skylight Books celebrates Independent Bookstore Day, featuring editors of Exposition Review in celebration of their third issue "Orbit," 2:00: literary trivia, prizes, you can come solo or with a team of up to four players; starting at 5:00, Exposition Review launch party and reading, Skylight Books, 1818 N. Vermont Avenue, Los Angeles, free, 10:00 a.m. to closing (www.skylightbooks.com/event)